Why has my stainless steel pan developed a white film on the inside?
This is caused by minerals in water or from starch in food. Remove by rubbing a sponge that has been dipped in lemon juice or vinegar. Boaters often use seawater and salt can cause white spots or pits to form on stainless steel which cannot be removed. To avoid salt damage, salt should be added to cooking water after it has come to a boil.